Elastic low stable eql

Memory Dump File with Unusual Extension

Identifies the creation of a memory dump file with an unusual extension, which can indicate an attempt to disguise a memory dump as another file type to bypass security defenses.

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Detection Logic

file where host.os.type == "windows" and event.type == "creation" and

  /* MDMP header */
  file.Ext.header_bytes : "4d444d50*" and
  not file.extension : ("dmp", "mdmp", "hdmp", "edmp", "full", "tdref", "cg", "tmp", "dat") and
  not 
  (
    process.executable : "?:\\Program Files\\Endgame\\esensor.exe" and
    process.code_signature.trusted == true and length(file.extension) == 0
  ) and
  not
  (
    process.name : "System" and file.extension : "tmpscan"
  )

Field Validations

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